v3: type checking and lint pass clean — thumbnail placeholder takes file-dump props, no manual memo the compiler can't keep, no setState straight in effect bodies

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/components/ChatModal.tsx

@@ -527,12 +527,12 @@ export function ChatModal({ onClose }: { onClose: () => void }) {
     return out;
   }, [messages]);
 
-  const typingLabel = useMemo(() => {
-    const names = typingOthers.map((u) => u.username);
-    if (names.length === 1) return t`${names[0]} is typing…`;
-    if (names.length === 2) return t`${names[0]} and ${names[1]} are typing…`;
-    return t`Several people are typing…`;
-  }, [typingOthers]);
+  const typingNames = typingOthers.map((u) => u.username);
+  const typingLabel = typingNames.length === 1
+    ? t`${typingNames[0]} is typing…`
+    : typingNames.length === 2
+    ? t`${typingNames[0]} and ${typingNames[1]} are typing…`
+    : t`Several people are typing…`;
 
   return (
     <Modal title={t`Chat`} onClose={onClose} wide>

src/components/DumpCreateModal.tsx

@@ -333,7 +333,8 @@ export function DumpCreateModal(
   const toggleCategory = (id: string) =>
     setSelectedCategoryIds((prev) => {
       const next = new Set(prev);
-      next.has(id) ? next.delete(id) : next.add(id);
+      if (next.has(id)) next.delete(id);
+      else next.add(id);
       return next;
     });
 

src/components/Thumbnail.tsx

@@ -1,4 +1,4 @@
-import { useState } from "react";
+import { type ComponentProps, useState } from "react";
 import { canProxyImage, proxyImageUrl } from "../utils/proxyImage.ts";
 import ThumbnailPlaceholder from "./ThumbnailPlaceholder.tsx";
 
@@ -9,12 +9,7 @@ interface ThumbnailProps {
   className?: string;
   loading?: "lazy" | "eager";
   /** Passed through to the placeholder when there's nothing to show. */
-  placeholder: {
-    url?: string;
-    accentColor?: string;
-    faviconUrl?: string;
-    siteName?: string;
-  };
+  placeholder: Omit<ComponentProps<typeof ThumbnailPlaceholder>, "className">;
   /** Extra class for the placeholder element only. */
   placeholderClassName?: string;
 }